package com.itheima.reggie.service.Impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.pojo.Category;
import com.itheima.reggie.pojo.Dish;
import com.itheima.reggie.pojo.Setmeal;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Slf4j
@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category>  implements CategoryService {

    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;

    /**
     * 根据id删除分类，删除之前需要进行判断是否有关联菜品或者套餐
     * @param id
     */
    @Override
    public void remove(Long id) {
        //添加分类条件，查询分类Id查询是否有关联数据
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Dish::getCategoryId,id);
        //调用dishService查询是否有关联数据
        int count1 = dishService.count(queryWrapper);
        //查询当前分类是否关联了菜品，如果已经管理，直接抛出一个业务异常
        if (count1 > 0){
            //已经关联了菜品，抛出一个业务异常
            throw new CustomException("当前分类项关联了菜品,不能删除");
        }

        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int count2 = setmealService.count(setmealLambdaQueryWrapper);
        //查询当前分类是否关联了套餐，如果已经管理，直接抛出一个业务异常
        if (count1 > 0){
            //已经关联了套餐，抛出一个业务异常
            throw new CustomException("当前分类项关联了套餐,不能删除");
        }
        //如果没有关联数据，则正常删除
        super.removeById(id);
    }
}
